package com.exam.util;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.exam.business.Catalog;
import com.exam.business.ListCatalog;

public class DoCatalog extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public DoCatalog() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out
				.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the GET method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String param1=request.getParameter("textfield");
		String type=request.getParameter("select2");
		
		if(type.equals("courseID"))
		{
			List<Catalog> temp=ListCatalog.findCatalogById(param1);
			
			if(temp.size()!=0) request.setAttribute("catalogs", temp);
			else {response.sendRedirect(request.getContextPath()+"/stu_coursecenter.jsp?fail=1");return;}
		}
		else
		{
			List<Catalog> temp=ListCatalog.findCatalogByCourse_name(param1);
			
			if(temp.size()!=0) request.setAttribute("catalogs", temp);
			else {response.sendRedirect(request.getContextPath()+"/stu_coursecenter.jsp?fail=2"); return;}
		}
		
		
		request.getRequestDispatcher("/stu_points.jsp").forward(request, response);
		
		
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
